SSC CGL learners · 8 min
Percentages
Understand percent as a rate per hundred, convert between forms, and solve everyday aptitude questions.
Convert between fractions, decimals and percentages, then calculate a percentage of a quantity.
What does percent mean?
Percent means “per hundred.” So 25% means 25 out of every 100, which is the fraction 25/100 or 1/4.
Example
12% = 12/100 = 0.12
Find a percentage of a number
Write the percentage as a decimal, then multiply by the quantity. This keeps the calculation direct.
Example
15% of 240 = 0.15 × 240 = 36
Use a convenient fraction
For common percentages, a fraction can make mental arithmetic quicker. For example, 25% is one quarter.
Example
25% of 84 = 84 ÷ 4 = 21
Knowledge check
Try it yourself
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About this lesson
Source: Original GyanStudio learning material. Editorial review pending. Last updated 5 November 2026.
This learning preview is not an official exam notice or a substitute for checking the relevant authority’s current information.